{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "577745560",
    "entityType": "User",
    "nonce": "0xf1463d8f58aecbe85a85fa18c6a739b4ed450e4362648df0b2ad7ee0de982007",
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    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}